Oh, chapter 155. It's raining outside, and it's starting to rain again. The narrator is still wearing his panties. He's still in love with Natsuo, but he's not sure if he still wants to be with her. He doesn't want to apologize to her, though, because she's his older sister, and he can't be expected to be cool around her anymore. He asks if she still loves him, and she says yes, even though she knows part of him still wants her to marry him. He also asks if they exchanged rings when they were still together, and the narrator says the truth is that they never stopped loving each other, and that she couldn't bear to let him marry her. She also says that she got a chain for 1,500 yen, which is a lot of money for a chain. She's worried about rui, but she feels like she has to be strong for her sister. She says that they haven't been able to catch up with each other as much as she'd like, because they've had so much time to talk, and everyone knows them by name now. She wonders if she would've known about their relationship if she hadn't met them on her own. She thinks that everyone is a specialist in their field, and they're all making new things together. She starts to feel a little bit jealous of how late it is, and wonders why they don't get some sleep. She wants to sleep in her sister's lap, but her sister won't let her.